THE INVISIBLE PROBLEM WITH SENDING PEOPLE TO MARS

Summary from the TLDR newsletter

There are obvious challenges to getting people to Mars, but the biggest obstacle might be something that's totally invisible and often overlooked: space radiation. Scientists are just beginning to learn about the many ways that exposure to space radiation can impact human health. The effects of space radiation may also combine with other factors such as sleep deprivation and microgravity - there is not enough information yet about how these factors interact. Finding ways to mitigate these effects will determine whether people will ever be able to visit Mars safely.